package chapter04.example14;

abstract class  Animal{
    abstract void  shout();
}
class Cat extends Animal{
    void shout() {
        System.out.println("喵喵喵........");
    }
}
class  Dog extends Animal{
    void shout(){
        System.out.println("汪汪汪.....");
    }
}
public class example14 {
    public static void main(String[] args) {
        Animal an1 = new Cat();
        Animal an2 = new Dog();
        an1.shout();
        an2.shout();
    }
}
